<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>用户登录</h1>
    <input type="text" v-model="user.username" placeholder="请输入用户名">
    <input type="password" v-model="user.password" placeholder="请输入密码">
    <input type="button" value="登录" @click="login()">
</div>
</body>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
    let v = new Vue({
        el: "body>div",
        data: {
            user: {
                username: "",
                password: ""
            }
        },
        methods: {
            login(){
                axios.post("/login",v.user).then(function (response) {
                    if(response.data==1){
                        alert("登录成功")
                    }else if (response.data==2){
                        alert("密码错误")
                    }else {
                        alert("用户名不存在")
                    }
                })
            }
        }
    })
</script>
</html>